Relating to or involving writing, drawing, or recording made with one's own blood.
From Greek haima (blood) + autos (self) + -graph (writing or drawing). This rare term describes self-made blood marks or records, sometimes appearing in historical or artistic contexts.
Historical documents actually exist where people signed in blood or made blood marks—it's a haunting reminder that before standardized signatures, people sometimes made marks with what they had to prove identity or commitment.
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